linux-kernel - [PATCH net-next 3/4] net/mlx5: Preserve rate settings when creating a rate node

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Message-ID: <1741642016-44918-4-git-send-email-tariqt@nvidia.com>
Date: Mon, 10 Mar 2025 23:26:55 +0200
From: Tariq Toukan <tariqt@...dia.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Andrew Lunn <andrew+netdev@...n.ch>
CC: Gal Pressman <gal@...dia.com>, Mark Bloch <mbloch@...dia.com>, "Moshe
 Shemesh" <moshe@...dia.com>, Saeed Mahameed <saeedm@...dia.com>, "Leon
 Romanovsky" <leon@...nel.org>, Tariq Toukan <tariqt@...dia.com>,
	<netdev@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Carolina Jubran <cjubran@...dia.com>, "Cosmin
 Ratiu" <cratiu@...dia.com>, Dragos Tatulea <dtatulea@...dia.com>
Subject: [PATCH net-next 3/4] net/mlx5: Preserve rate settings when creating a rate node

From: Carolina Jubran <cjubran@...dia.com>

Modify `esw_qos_create_node_sched_elem()` to receive max_rate and
bw_share values while maintaining the previous configuration.

This change is essential for the upcoming patch that will modify rate
nodes and requires the existing settings to be preserved unless
explicitly changed.

Signed-off-by: Carolina Jubran <cjubran@...dia.com>
Reviewed-by: Dragos Tatulea <dtatulea@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
index 959e4446327d..3c850efb4ca3 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
@@ -320,8 +320,9 @@ static int esw_qos_set_node_min_rate(struct mlx5_esw_sched_node *node,
 	return 0;
 }
 
-static int esw_qos_create_node_sched_elem(struct mlx5_core_dev *dev, u32 parent_element_id,
-					  u32 *tsar_ix)
+static int
+esw_qos_create_node_sched_elem(struct mlx5_core_dev *dev, u32 parent_element_id,
+			       u32 max_rate, u32 bw_share, u32 *tsar_ix)
 {
 	u32 tsar_ctx[MLX5_ST_SZ_DW(scheduling_context)] = {};
 	void *attr;
@@ -338,6 +339,8 @@ static int esw_qos_create_node_sched_elem(struct mlx5_core_dev *dev, u32 parent_
 		 SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR);
 	MLX5_SET(scheduling_context, tsar_ctx, parent_element_id,
 		 parent_element_id);
+	MLX5_SET(scheduling_context, tsar_ctx, max_average_bw, max_rate);
+	MLX5_SET(scheduling_context, tsar_ctx, bw_share, bw_share);
 	attr = MLX5_ADDR_OF(scheduling_context, tsar_ctx, element_attributes);
 	MLX5_SET(tsar_element, attr, tsar_type, TSAR_ELEMENT_TSAR_TYPE_DWRR);
 
@@ -409,7 +412,8 @@ __esw_qos_create_vports_sched_node(struct mlx5_eswitch *esw, struct mlx5_esw_sch
 	u32 tsar_ix;
 	int err;
 
-	err = esw_qos_create_node_sched_elem(esw->dev, esw->qos.root_tsar_ix, &tsar_ix);
+	err = esw_qos_create_node_sched_elem(esw->dev, esw->qos.root_tsar_ix, 0,
+					     0, &tsar_ix);
 	if (err) {
 		NL_SET_ERR_MSG_MOD(extack, "E-Switch create TSAR for node failed");
 		return ERR_PTR(err);
@@ -476,7 +480,8 @@ static int esw_qos_create(struct mlx5_eswitch *esw, struct netlink_ext_ack *exta
 	if (!MLX5_CAP_GEN(dev, qos) || !MLX5_CAP_QOS(dev, esw_scheduling))
 		return -EOPNOTSUPP;
 
-	err = esw_qos_create_node_sched_elem(esw->dev, 0, &esw->qos.root_tsar_ix);
+	err = esw_qos_create_node_sched_elem(esw->dev, 0, 0, 0,
+					     &esw->qos.root_tsar_ix);
 	if (err) {
 		esw_warn(dev, "E-Switch create root TSAR failed (%d)\n", err);
 		return err;
-- 
2.31.1